19500122 has 16 divisors (see below), whose sum is σ = 32040360. Its totient is φ = 8859648.

The previous prime is 19500121. The next prime is 19500127. The reversal of 19500122 is 22100591.

It can be written as a sum of positive squares in 4 ways, for example, as 18309841 + 1190281 = 4279^2 + 1091^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19500094 and 19500103.

It is not an unprimeable number, because it can be changed into a prime (19500121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8903 + ... + 10874.

Almost surely, 2^19500122 is an apocalyptic number.

19500122 is a deficient number, since it is larger than the sum of its proper divisors (12540238).

19500122 is a wasteful number, since it uses less digits than its factorization.

19500122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 19500122 is about 4415.8942469221. The cubic root of 19500122 is about 269.1611919296.

The spelling of 19500122 in words is "nineteen million, five hundred thousand, one hundred twenty-two".